Process of treating timber



Patented une 29, 1920.

H. K. HESS. PROCESS OFvTREATING TIMBER. APPLICATION mm ocT'l 11, 191s.

ATTORNEYJ` HENRY n. nnss, or sYnAcUsE, Naw Yoan.

PROCESS F TBEATING TIMBER.

Specification of Letters Patent. Patented June 29, 1920 Application med october 11, 19'18. serial No. 257.786.

- new and useful Process of Treating Timber,

of which the following is a specification.

This invention has for its object a particularly simple economical and eicient' process of treating wood and lumber to make the same ire proof and also capable of withstanding the elements when exposed; and it consists in the steps and in the novel features hereinafter set forth and claimed.

In describing this invention, reference is had to the accompanying drawings in which like characters'designate corresponding parts in all the views.

Figure 1 is a fragmentary view of a building structure including joists and flooring supported thereby, the timbers of which are treated in accordance with my process.

Fig. 2 is'a sectional view through studding, sheeting and clap boards, the studding and sheeting being treated in accordance with my process.

Fig. 8 is an end view ofthe studding.

This process consists in applying to the` wood, a coat of fire proofing material as sodium silicate or 'water glass, applying thereto a protective coating of plastlc material which-:hardens and is capable of receiving a water proofing paint, and applying paint to the plaster coating. However, y

' the coat of paint may be omitted.

Usually, in order to give body to the fire proofing coating and to make the plaster adhere thereto, a coating of sawdust is applied in suiiicient quantity to absorb the sodium silicate not taken up by thetimber, the Acoating of silicate being suiiicient to impregnate or saturate a layer of sawdust.

In other words, a layer not only' of sodium silicate is applied to the timber but also in effect a layer of sawdust saturated or .im-

regnated with sodium silicate is applled. The sodium silicate or 'water glass is preferably irst' applied to the lumber by dipping the lumber or by painting the water glass thereon; and while the water glass is wet the sawdust. is spread on the wet surface and ybecomes impregnated with the sodiumvsilicate. Thereafter, a plaster such as laster of Paris or a gypsum plasteris applied and when set the water proofing paint as asphaltum or other paint is applied. In some cases,

it is preferable to ltreat the sawdust with water glass before applying to the lumber, the surface of which is coated with water glass so that the sawdust is saturated with water glass and is thoroughly bound to the lumber. y

One of the objects of the sawdust impregnated with water glass is to provide a rough surface tol which the plaster will adhere or a binder between the wood and the plaster. The object'of the plaster is to protect the water glass to increase the fire proofing, also to provide a surface which will receive a water proofing paint as asphaltum 0r oil paints, as it is not practical to apply paint directly to the surface impregnated wlth water glass for the reason that the water glass dsintegrates the paint especially in the presence of molsture. The paint renders the plaster impervious to moisture.

' In F ig. 1, 1 designates the joists and 2 the flooring of a structure, the joists being provided with a coating 3 of water glass and sawdust; 4 is the layer of plaster. 5 is the coating of paint.

These coats are applied to the sides of the studding. It is not necessary to apply it to the edges 6 which edges abut against other timbers.

7 designates a sub-floor to which -are applied coats of water glass, sawdust, plaster and paint. 8 is the top of finishing ooring.

In Fig. 2, 9 designates studding; 10 the sheeting nailed to the studding and 1l vclap boards, the lstudding having its opposite edges treated in accordance wlth my process as shown in. Fig. 3 and the sheetin'g'being n treated on its inner and outer sides in accordance with my process.

What .I claim is:

1. The process of treating lumber consisting in applying a coating of sodium silicate tothe lumber, applying a coat of plaster capable of receiving a water proof paint, and then applying a coat of water proof paint..

The process of treating lumber consisting in applying a coat of sodium silicate to the lumber, applying a coating of plaster to receive water proof material and applying a water proofing material tothe plaster.

f3. The process of treating lumber consisting' in applying a coat of sodium silicate and cient to absorb the excess sodium silicate not absorbed into the lumber.

5. The process of treating lumber consisting in -applying a coat of vsodium silicate and sawdust and applying a protective coat of plaster on the coating of sawdust and so-C dium silicate. a

6. The process of lire proofing lumber consisting in applying a coat of sodium silicate,

10 applying to sald coat a layer of sawdust lsufcient to absorb the excess sodium silicate, applying a coating of plaster capable of receiving a coat of water proof palnt, and applying water proof paint to the coating of plaster.

In testimony whereof, I have hereunto signed m name, at Syracuse, in the county of Onon aga, and State of New York, this 5th day of October, 1918.

` HENRY K. HESS. 

